New and high qualityMaterial: plasticColor: whiteSize:As the pictures showRack modulus: 0.5Rack length: 125mmTeeth height: 7mmTooth floor width: 4mmFixed aperture: small gap 2.15 mm, wide gap 2.65 mmPackage Included:10pcsNote:1. Due to handbook measurement, please allow an error of 1-3mm.2. As various computers exhibit assorted colors, thank you for your understanding, the particular product colour may be slightly diverse from the image.